When YouTube celebrated its seventh birthday on May 21, the Google-owned clip streaming service revealed that 72 hours worth of video content is now being uploaded every 60 seconds – up from 48 hours in 2011.

YouTube has also announced that subscriptions to the service have risen by 50% over the past year.

With over 800 million users watching more than three billion hours of video every month, it now boasts “tens of millions” of channels – including countless branded content channels. It is also the world’s most used mobile streaming platform.

Over the past year, YouTube has redesigned the site, and worked to expand its original programming – launching dozens of new content channels. It has also added the option of converting all short-form videos to 3D.

“We’ve come a long way in the past seven years,” YouTube posted on its blog. “What started as a handful of videos shared among friends has transformed into a global platform delivering the next generation of channels to anyone, anywhere, and on any device.”